### Describe the issue In the controladdin "WebPageViewer" the ressource loader.gif is not found (Spinner) If you send a long html string to the addin you should see a spinner. Instead of the spinner, you see the following: <img width="1616" height="1231" alt="Image" src="https://github.com/user-attachments/assets/bd154b86-a45a-4a6a-908a-c3fb072b5fe1" /> Not quite sure what causes the problem. maybe here: WebPageViewerHelper.js var spinnerSrc = Microsoft.Dynamics.NAV.GetImageResource('Loader.gif'); WebPageViewer.ControlAddin.al Images = 'Resources\WebPageViewer\images\Callback.html', 'Resources\WebPageViewer\images\Loader.gif'; Please can someone help me to get this fixed? I am not a professional in JS. ### Expected behavior Spinner is shown. ### Steps to reproduce see above. ### Additional context _No response_ ### I will provide a fix for a bug - [ ] #4169